It's obviously a scam! Don't give away the secret keys of your wallet address in any case, and you won't be fooled!
Basic Attention Token Airdrop
Please, enter the private key of your Ethereum wallet “wallet address” in order to automatically sign the special encrypted message that will verify that it is actually your wallet (We will not send BAT Token to fake wallets).
Enter Your Private Key: (64 character)
Note: This is safe. We DO NOT use, store or collect your personal data (such as private key). This form is fully encrypted and secured by the SSL standard and MD5 hashing protocol. No one will be able to access your wallet and you can update your wallet address.
[/UpdateEthAddress]
Confirm to get more 100 BAT.
Never Give private key of your wallet cause legit airdrops is just only wallet address needed so be careful and i think only beginners will deceived by this obvious scam.